Lennox Hearth VIN - Manual (Page 16)

16 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Gas Line Installation
This stove must be connected to the gas line in accordance with local
codes and/or the National Fuel Gas Code, ANSI Z223.1 (In Canada, the
current CAN/CSA B149.1 installation code).
The gas line screws into the gas valve at the back of the stove 5” in from
the right side of the stove and 4 3/16” up from the base of the unit. After
connecting the gas line, all joints in the line and connections at the valve
should be checked for leaks. After connecting the gas line, all joints in
the line and connections at the valve should be checked for leaks before
final positioning of the unit. Conduct a gas leakage test of the appliance
piping and control system downstream of the shutoff valve in the supply
line to the appliance.
Gas Pressure Requirements
A MAJOR CAUSE OF OPERATING PROBLEMS WITH GAS
APPLIANCES IS IMPROPER GAS PRESSURE!
The most important item to check during the initial installation
and the first thing to check when operating problems occur is
gas pressure! This appliance will not function properly unless
the required gas pressure is supplied. See the table on this
page for gas pressure requirements.
Two pressure taps are provided on the stove’s valve to check gas pressures.
To access the taps remove the two socket head screws to remove the
valve control panel. The taps are located above the on/off/pilot knob (see
the diagram on Page 20). The right tap is the inlet (supply) pressure side.
To check inlet pressure (with the stove burning) insert a small flat bladed
screw driver into the tap and turn a half turn counter-clockwise. Cover
the tap with the line from a manometer. Read the pressure. Close tap
gently but securely after completing the check. The manifold (outlet) tap
is to the left of the inlet tap. To check manifold pressure (with the stove
burning at the high burn setting) insert a small flat bladed screwdriver
into the tap and turn a half turn counter-clockwise. Cover the tap with
the line from the manometer and check the pressure. Again close tap
gently but securely after completing the check. Check the taps for gas
leaks with a gas leak test solution (retighten if necessary).
LP and Natural Gas Supplies:
Your Vintage™ gas stove is equipped from the factory for use with natural
gas only as specified on the Safety / Listing label attached to the appliance.
This appliance can only be operated using propane gas (LP) if a certified
fuel conversion kit provided by Lennox Hearth Products is installed by a
qualified service technician.
Also check the orifice size on the label on the igniter bracket. It must be
the correct size for the fuel and altitude.
Do not run propane tank dry. Running the tank dry may cause a
hazardous condition due to pressure drop in empty tank.
Solid fuel is NOT to be used with this unit.
Fuel
Type
Inlet Pressure Manifold Pressure
Desired Minimum Maximum On Hi
Fire
On Lo
Fire
Natural
Gas
7" WC 5" WC 10.5" WC 3.5" WC 1.8" WC
LP Gas 11" WC 11" WC 13" WC 10" WC 6.0” WC
If the pressure is not sufficient, make sure the gas supply line is large
enough, The supply regulator is properly adjusted and the total gas load
for the residence does not exceed the amount supplied.
The appliance and its individual shut off valve must be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
1/ psig.
The appliance must be isolated from the gas supply piping
system by closing its individual manual shut-off valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/ psig. Check with your gas
supplier or plumber.